The Gwolle Guestbook WordPress plugin before 4.2.0 does not sanitise and escape the gwolle_gb_user_email parameter before outputting it back in an attribute, leading to a Reflected Cross-Site Scripting issue in an admin pageCreditsJrXnmReferenceshttps://wpscan.com/vulnerability/e50bcb39-9a01-433f-81b3-fd4018672b85
